In a reflector antenna[?], the relative reduction in the effective aperture of the antenna caused by the masking effect of other antenna parts, such as a feed horn or a secondary reflector, which parts obstruct the radiation path.
... for a household in the town is $72,500, and the median income for a family is $89,211. Males have a median income of $51,172 versus $32,500 for females. The per capita ...